Hoist.



PATBNTBD NOV. 20, 1906.

B. Y. MOORE.

' HOIST.

nrmornou nun ran. 20. 1906.

5 sums-sum 1.

No. 836,451. PATENTED NOV. 20, 1906.

n. Y. MOORE.

HOIST. I APPLICATION FILED PEB.20.1906.

IRSKEETS-rBHEET 2.

A E C E K K Fig .41.

WW@ v 7 3m Vawfi WM UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Nov. 20, 1906.

Application filed February 20, 1906. Serial No. 301,994.

To all whmn it may concern: I

Be it known that I, EDWARD Y. MOORE, a citizen of the United States, residing at Cleveland, in the county of Ouyahoga, and State of Ohio, have invented a ,certain new and useful Improvement in Hoists, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

The object of this invention is to provide a hoist with simple and compact mechanism for shifting it and for holding it at any desired point.

My patent No. 811,077, granted January 30, 1906, shows a hoist carried by supportingwheels which run on the lower flange of a horizontal I-beam, such hoist being especially designed for use on shipboard where the available head room is very limited. The mechanism constituting'the present inventi on is well adapted for such hoist.

The characteristics of the invention are hereinafter more fully described, and definitely set out in the claims.

In the drawings, Figure 1 is a side eleva- I tion of a hoist embodying my propelling and locking mechanism. Fig. 2 is a plan thereof. Fig. 3 is an end elevation. Fig. 4 is a vertical cross-section along the propelling-shaft.

As shown in the drawings, A represents the supporting I-beam, on the lower flange a of which the supporting-wheels O travel. These wheels are j ournaled on studs extending inward from the side plates 6 b of a frame B, which extends from opposite sides of the I- beam down beneath it, the two halves of the frame being there bolted together. Projecting outwardly from the side members I) b of I the frame are studs on which are mounted the lifting wheels E. Rigid with these wheels are gears F, which mesh with pinions g on the main driving-shaft G.

A hand chain-wheel H is mounted on the driving-shaft G to operate it. The connection between the hand chain-wheel and the driving-shaft may be direct or by means of back gearing, as shown in my patent referred to. It may also involve a brake mechanism, making the hoist self-locking, as set out in that patent and in my prior patent, No. 794,997, issued July 18, 1905. v

The side member I) of the frame is extended forward and has lugs on its outer side. To these lugs is secured a two-part casing K,

which contains a worm L and a worm-wheel N. Bolts P P P furnish means for holding the casing to the hoist-frame and for holding the casing-halves together. The shaft M of the worm-wheel is journaled in the casing K at one end and at the other end in an extension 6 ofthe frame-plate I), this extension being inward and downward beneath the I- beam. Rigid on this shaft 1s a gear Q, which meshes with a rack R, secureo to the under side of the I-beam.

A hand chain-wheel S is mounted on the forward end of the worm-shaft. When this hand chain-wheel is rotated by its chain T, the gear Q is caused to rotate and being in engagement with the stationary rack causes'the hoist to travel in one direction or the other, as desired. The worm and worm-wheel make this propelling mechanism also a lock for the hoist, holding it in any position, due to the characteristic of a worm and wormwheel that pressure applied to the wormwheel will not rotate the worm. A chain.- guard U is provided for the hand chainwheel S, which guard surrounds the reduced shank of the worm and holds the worm in place in the casing, the guard being bolted to the ears 7c in the casing. This construction is shown and claimed in my application, Serial No. 236,423, filed December 12, 1904.

have herein referred to the end of the hoist where the racking mechanism is located as the forward or front end. These are convenient terms, though it is to be understood that either end is the front end, according to the direction in which the hoist is trav eling. Accordingly, when considered with reference to the direction of travel the so called forward or front end is half the time the rear end.

It will be seen that my propelling and locking mechanism takes up very little additional room. It does not diminish the height to which. the load may be raised, and it requires no additional head room and allows the hoist to be shifted in one direction as far and in the other direction nearly as far as if the hoist were shifted by hand. The mechanism is simple and very efficient. It is well adapted for use on shipboard for lifting guns out of their carriages and performs its work as well when the ship is rolling as when it is quiet. By having the lift handchain and the propelling hand-chain operate in paths at ing-shaft, independent racking mechanism having a driving-shaft, said driving-shafts being located at right angles to each other, and independent hand chain-wheels on the two shafts.

3. The combination with an I-beam having a rack secured to its lower face, of a hoist having supporting wheels riding on the flange of the I-beam, elevating mechanism carried by the hoist-frame, racking mechanism carried by the hoist-frame and engaging such rack, a pair of independent hand chainwheels for driving the elevating mechanism and the racking mechanism respectively.

4. The combination of a beam having a rack on its under side, a hoist-frame mounted to travel on said beam, elevating mech anism carried by said hoistframe, a shaft carried by the hoist-frame, a pinion and a wormwheel both mounted on said shaft, said pinion meshing with the rack, a worm engaging the worm-wheel, and a hand chain wheel mounted on the shaft of the worm.

5. The combination with an I-beam having a rack secured to its lower face, a hoist having supporting means riding on the flange of the I-beam, the frame of said hoist extending beneath the Ibeam and rack, a shaft mountedin said frame, a gear on said shaft meshing with said rack, a worm wheel mounted on said shaft, a worm meshing with the worm-wheel, and means for driving the worm.

6. The combination with a beam having a rack on its under side, a hoist mounted to travel on the beam and having a frame with side plates extending on opposite sides of the beam, a wormheel casing carried by such frame upon one side, a depending lug from the other side of the frame, a shaft journaled in said lug and in said casing, a gear on said shaft meshing with the rack, the worm-wheel being also on said shaft, a worm meshing with the worm-wheel, and means for driving the worm.

7. In a hoist, the combination with a hoistframe, of a wormheel casing bolted to the frame, a shaft journaled at one end in the casing and at the other in the frame, a worm-wheel and gear on said shaft, the

worm-wheel being within the casing, a worm in the casing engaging the worm wheel, means forrotating the worm, and a station ary rack with which said gear engages.

8. The combination with an I-beam having a rack secured to its lower face, a hoist having supporting wheels riding on the flange of the Lbeam, the frame of said hoist extending beneath the I-beam and rack, a shaft mounted in said frame, a gear on said shaft meshing with said rack, a worm-wheel casing secured to said frame, a worm-wheel within the casing mounted on said shaft, a worm meshing with the worm-wheel, and means for driving the worm.

9. The combination with an I-beam having a rack on its under side, a hoist'having wheels riding on the lower flange of the I- beam and having a frame extending beneath the I-beam and elevating-wheels on opposite sides of the I-beam, of a worm and wormwheel carried by a forward extension of the frame on one side in front of one of the elevating-wheels, whereby no extra head-room is required for the worm and worm-Wheel, and a gear connected with the worm-wheel and engaging said rack.

1 O. The combination with a beam, of a hoist mounted to travel thereon, a rack secured to said beam, and a worm and worm-wheel drive geared with said rack and mounted on said hoist at the front of one of the elevatingwheels thereof, whereby a propelling and locking mechanism is provided which requires no additional head-room.

11. In a hoist, the combination with a frame, of an elevating-wheel carried thereby, a hand chain-wheel for rotating the elevating-wheel, a worm carried by the frame, a hand chain-wheel on the worm at right angles to the lift hand chain-wheel, a wormwheel connecting with the worm, and mechanism driven by the worm to shift the hoist in one direction or the other, the mounting of said hand chain-wheels allowing a compact construction while preventing interference of the hand-chains.

12. A hoist arranged to travel on a beam and comprising supporting-wheels, an elevatingwheel, a flexible lifting member running on the elevating-wheel, a gear adapted to mesh with a rack on the supporting-beam, and a worm and worm-wheel carried by the hoist and adapted to drive said gear.

13. The combination of a beam, mounted to travel on the beam, an elevatingwheel on said hoist, a flexible member running on said elevating-wheel, hand-operated means for rotating the elevatingwheel, a rack carried by the beam, a worm and wormwheel mounted on the hoist, an operative connection between the worm-wheel and the rack, and hand-operated means for rotating the worm.

14. The combination of a beam having a rack, a hoist mounted to travel on said beam foo a hoist and comprising an elevating-wheel, a hand chain-wheel in connection therewith, a flexible lifting member running on the elevatingwheel, a gear on said hoist, operatively connected with said rack, a worm and wormwheel mounted on the hoist, a connection be tween the worm-wheel and the gear, and rotatable hand-operated means for driving the worm.

15. The combination of a supporting beam carrying a rack, a hoist having wheels riding on the beam, lifting mechanism carried by the hoist-frame, racking mechanism carried by the hoist-frame and engaging such rack, a hand chain wheel for driving the lifting mechanism, and independent hand-operated means for driving the racking mechanism.

16. A hoist arranged to travel on a beam and comprising supporting-wheels, an elevating-wheel, a flexible lifting member running on the elevating-wheel and a worm carried by the hoist in operative connection with a rack on the supporting-beam.

17. The combination of a supporting-beam carrying a rack, a hoist having wheels riding on said beam, lifting mechanism carried by the hoist-frame, racking mechanism carried by the hoist-frame and engaging such rack and including a worm, a hand chain-wheel for driving the lifting mechanism, and independent hand-operated means for rotating the worm, whereby the racking mechanism is self-locked.

In testimony whereof I hereunto afliX my signature in the presence of two witnesses.

EDWARD Y. MOORE. 

